 This study compared the accuracy of eight precipitation estimates derived from four different satellite retrieval algorithms. The results showed that the satellite-only products had poor performance in detecting rainfall events, with low positive predictive value, PPV, and high false alarm ratio, far. The bias-corrected products improved the accuracy of the original satellite products, especially those from the TRMM Multisatellite Precipitation Analysis, TMPA, and Climate Prediction Center Morphing Technique, CMORPH. However, the Persian product still performed poorly in detecting rainfall events. This article was authored by Haogua, Xingqian, Amingbao, and others.